pronto ... I do not know how to follow this one up. Anyways, I am well versed in both cryptocurrencies and investing, as I actively watch and in limited scale participate in trading. When it comes to MTLs, my experience comes mostly from correcting English texts, but my native language should not cause much of a headache either.
When it comes to the proof-editing fee, the usual 0,02 USD per word (0,018 EUR per word) is my baseline, but it can be negotiated of course.